Migrating to Cloud SDK

As of July 30, 2019, the standalone App Engine SDK is deprecated. It
will become unavailable for download on July 30, 2020. The following table
lists the deprecated features and recommended alternatives:

index.yaml

Create an index.yaml file with an indexes object containing a list of
objects, each with fields that correspond to each of the <datastore-index>
tag attributes in your datastore-indexes.xml file, as shown below.

Caution: Queue creation for the task queue service can also be managed using
Queue Management methods available through the Cloud Tasks API, but mixing
the queue.yaml method with the Queue Management methods can produce
unexpected results and is not recommended. For more information, see
Overview of Queue Management and queue.yaml.